Ductile Iron Pipe

详情

1)  The standard of pipe: ISO ***1 - ***8, EN*******2 , K9 
2)  Effective length: 6M when using bulk shipment way, or about 5.5M or 5.7M when 
    in *0\' container shipment way 
3)  Inner cement line: Portland cement lining as per ISO***9 
4)  Zinc coating: at least **0gsm as per ISO ***9 
5)  Bitumen painting: at least *0um as per ISO ***9 
6)  Gaskets are NBR rubber, natural rubber, SBR rubber or EPDM rubber 
    tightness ring as per ISO***3 
7)   DN *0 - 1,**0 mm 
8)   High strength, lighter than gray iron, good corrosion resistance, no furring, 
    small flow resistance, easy fixing, long life time
9)   Checked by automatic inspection equipment

*0)  Composition: 
a)  C: 3.4 - 3.7% 
b)  Si: 2.0 - 2.4% 
c)  P: <0.*8% 
d)  S: <0.**5 
*1)  Pull strength: >**0MPa 
*2)  Yield: >*0% 
*3)  Hardness: <**0HB 
*4)  Process and testing: 
a)  Blast furnace (Analysis of raw materials test ) 
b)  Mg treatment (Micro & chemical composition test) 
c)  Pipe spinning (Temperature test) 
d)  Heat treatment (Micro structure; Flattening test) 
e)  Zinc coating (Thickness testing) 
f)  Dimensional checks (Thickness & Dia. testing) 
g)  Hydraulic test (Pressure test) 
h)  Internal lining (Thickness testing) 
i)  External coating (Thickness test)